Power circuit of ac power supply

Abstract

A power circuit of an AC power supply comprises a power input unit connected to a AC / DC converter. The AC / DC converter is connected to a DC / DC circuit, and the DC / DC circuit is further connected to an adjustable DC voltage regulation circuit. The adjustable DC voltage regulation circuit is connected to an amplifier to amplify and convert the DC voltages into the AC voltages, thereby outputting different AC voltages and electric currents under the condition of not switching off the output when adjusting the voltage via cross position, so that a power level is switched promptly and a very low power distortion.

Description

[0001]The current application is a continuation-in-part of Ser. No. 13 / 744,713 filed on Jan. 18, 2013.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a power circuit of an AC power supply.[0004]2. Description of the Related Art[0005]Referring to FIG. 1, a block diagram of a conventional AC power supply circuit is shown. An output procedure generated from a structure of the power circuit is described as follows. A power input unit 1 receives an outer AC voltage. The power input unit 1 is connected to an AC / DC converter 2 and converts the AC voltage provided from the power input unit 1 into a DC voltage via a filter and rectification.[0006]The DC voltage output from the AC / DC converter 2 is converted by a stable power of a primary side circuit 3 and sent to a transformer 4 for being transformed. The transformer 4 includes a set of primary winding 5 and two sets of secondary windings 6. The primary winding 5 is electrically connected to ...

AI Technical Summary

Benefits of technology

The present invention provides an AC power supply circuit that can output different voltages and currents while constantly adjusting the voltage. This allows for quick switching of power levels and low distortion. The circuit is connected to an adjustable DC voltage regulation circuit and an amplifier to simplify the circuit and lower costs. Additionally, the circuit can output different voltage levels without stopping the power supply. Overall, this invention provides a more efficient and effective solution for AC power supply.

Problems solved by technology

Since the AC power supply power circuit outputs different AC voltages via a plurality of parallel-series connections of the amplifiers, a complicated circuit and an increasing cost are caused.

In this manner, the voltage output needs to be interrupted, which renders the transmitted power level unable to be switched promptly.

However, since the switching operation of the parallel circuit and the series circuit of the switch circuit relies on the contactors but not on a stepless adjusting output mode, the switch circuit must be switched when the output is shut off to change the parallel and series connections of the power terminal of the amplifier for the voltage adjustment when the AC power supply switches and outputs different AC voltages.

Therefore, the conventional design causes the inconvenient operation of the AC power supply and needs an improvement.

Therefore, it may cause a great distorted error while stopping outputting.

Hence, the AC power supply power circuit is restricted and has the above-mentioned disadvantages.

Images